Electronic display cross-talk compensation systems and methods
An electronic display may include pixel circuitry to display an image based on image data compensated for voltage variations within the pixel circuitry. Image processing circuitry may generate a compensation value to compensate the image data for cross-talk (e.g., electromagnetic coupling between an electrode of touch sensor circuitry and an electrode of the pixel circuitry) that may cause the voltage variations. Additionally or alternatively, the image processing circuitry may generate another compensation value to compensate the image data for another cross-talk (e.g., electromagnetic coupling between two electrodes of the pixel circuitry). The image processing circuitry may generate the compensated image data based on the first compensation value and/or the second compensation value.
1. An electronic device comprising:
an electronic display comprising pixel circuitry and configured to display an image based at least in part on compensated image data; and
image processing circuitry configured to compensate input image data for voltage variations within the pixel circuitry of a plurality of pixels of the electronic display, wherein the image processing circuitry comprises:
touch cross-talk compensation circuitry configured to generate a first compensation value to compensate the input image data for a first cross-talk causing, at least in part, the voltage variations, wherein the first cross-talk comprises a first electromagnetic coupling between a first electrode of touch sensor circuitry and a second electrode of the pixel circuitry, and wherein the image processing circuitry is configured to generate the compensated image data based at least in part on the first compensation value; or
reference voltage cross-talk compensation circuitry configured to generate a second compensation value to compensate the input image data for a second cross-talk causing, at least in part, the voltage variations, wherein the second cross-talk comprises a second electromagnetic coupling between a third electrode of the pixel circuitry and the second electrode, and wherein the image processing circuitry is configured to generate the compensated image data based at least in part on the second compensation value.
2. The electronic device of claim 1 , wherein the first cross-talk comprises a change in a data line voltage signal of the second electrode based at least in part on a touch stimulus signal on the first electrode.
3. The electronic device of claim 2 , wherein the first compensation value is generated based at least in part on a frequency of the touch stimulus signal.
4. The electronic device of claim 1 , wherein the first compensation value for a given pixel of the plurality of pixels is generated based at least in part on a location of the given pixel on the electronic display.
5. The electronic device of claim 1 , wherein the second cross-talk comprises a first change in a reference voltage of the third electrode in response to a second change in a data line voltage signal of the second electrode.
6. The electronic device of claim 1 , wherein the reference voltage cross-talk compensation circuitry is configured to estimate an error in a reference voltage of the third electrode based at least in part on a change in voltage of the second electrode during a transition from programming of a first row of the electronic display to programming of a second row of the electronic display.
7. The electronic device of claim 1 , wherein the reference voltage cross-talk compensation circuitry is configured to estimate an error in a reference voltage of the third electrode for a given pixel based at least in part on an aggregate of a plurality of individual errors associated with a row of pixels of the plurality of pixels.
8. The electronic device of claim 7 , wherein the aggregate comprises a spatial average of the plurality of individual errors about the given pixel.
9. The electronic device of claim 1 , wherein the reference voltage cross-talk compensation circuitry is configured to estimate an error in a reference voltage of the third electrode based at least in part by referencing a look-up-table configured to map a difference between a first data line voltage signal of the second electrode during programming of a first pixel of the plurality of pixels and a second data line voltage signal of the second electrode during programming of a second pixel of the plurality of pixels to the error.